The best CPAP battery matches your machine's voltage, is FAA-approved for flight when necessary, and fits the trip you're planning. For most ResMed users, that's the Medistrom Pilot-24 Lite (95 Wh, 1.3 lb, and it flies carry-on with no approval needed). Flyers who want one battery that works across ResMed and Philips machines should look at the Medistrom Pilot Flex, and campers heading off-grid for several nights do better with the Freedom 160. This guide breaks down the real watt-hours, weight, and FAA status for every CPAP battery we carry, so you can match one to your machine before you buy.
CPAP is the standard nightly treatment for obstructive sleep apnea [1], and it only works on the nights you actually wear your CPAP mask [2]. Missing even one night matters. In a controlled trial, stopping CPAP sleep therapy brought sleep apnea back within days, along with daytime sleepiness and higher morning blood pressure [3]. That's exactly why a reliable portable CPAP battery is worth having on hand, whether it's for a power outage, a camping trip, or a flight.
Your setup really comes down to three things: your machine's voltage, how many watt-hours you actually need, and what the FAA allows in a carry-on. Get those three right, and the FAA rules for flying with a battery become easy. If you want the full picture of why a battery matters, our guide on why CPAP batteries are necessary explains it in more depth.
"CPAP therapy needs power every single night. No exceptions. Whether you're an outdoorsy person prepping for hurricane season or just flying across time zones, you need the right battery for your lifestyle."
— Daniel Feldman, Sleeplay team
1. Types of CPAP Batteries: Travel, Backup and Integrated
CPAP batteries come in three types: travel, backup, and machine-integrated. Travel batteries are light (usually 1 to 1.3 lb), stay under 100 Wh, and can fly carry-on with no approval needed. Backup batteries hold more capacity, up to 160 Wh, so they can run your machine for several nights during an outage. Integrated batteries clip onto one specific machine and nothing else.
Travel and portable batteries: Light, under 100 Wh, and FAA carry-on with no approval. The Medistrom Pilot Flex, Zopec Explore Mini, and Medistrom Pilot-24 Lite all fall in this group, and they're the right pick for flying or packing light.
Home backup and high-capacity batteries: Built for multi-night outages or long camping trips. The Freedom 160, the EXP48 Pro, and the universal Portable Outlet X9 (which powers any machine through a standard AC outlet) all fit here.
Machine-integrated solutions: Built for one-machine families, like the Transcend Micro PowerAway, which attaches directly to the Transcend Micro. If you want the fuller storm-prep picture, our CPAP Hurricane Preparedness Plan walks through building a complete outage kit around one of these.
2. Best CPAP Batteries at a Glance (2026)
Here's every CPAP battery we carry, side by side: watt-hours, weight, dimensions, runtime without a humidifier, and FAA status. No other guide puts all of that in one table, so start here before reading the full reviews below.
| # | Battery | Capacity | Weight | Dimensions | Runtime (no humidifier) | FAA air travel | Price |
|---|---|---|---|---|---|---|---|
| 1 | Medistrom Pilot Flex | 98 Wh | 1.2 lb | 6.6 x 3.0 x 0.8 in | About 2 nights | Carry-on, no approval | $339 |
| 2 | Medistrom Pilot-24 Lite | 95 Wh | 1.3 lb | 6.7 x 3.5 x 0.8 in | 1 to 2 nights | Carry-on, no approval | $339 |
| 3 | Medistrom Pilot-12 Lite | 95 Wh | 1.3 lb | 6.7 x 3.5 x 0.8 in | 1 to 2 nights | Carry-on, no approval | $339 |
| 4 | Zopec Explore Mini | 99.5 Wh | 1.0 lb | 6.5 x 3.0 x 1.0 in | AirMini ~15 h, AirSense ~12.5 h | Carry-on, no approval | $349 |
| 5 | Transcend PowerAway | 71 Wh | 1.0 lb | 4.8 x 5.2 x 1.3 in | Up to 17.5 h (Transcend Micro) | Carry-on, no approval | $349.95 |
| 6 | Freedom 160 | 160 Wh | 2.2 lb | 7.9 x 5.1 x 1.0 in | 3 to 5 nights | Carry-on WITH airline approval | $349.99 |
| 7 | EXP48 Pro | 153.6 Wh | 3.25 lb | 1.6 x 6 x 8.2 in | 2 to 3 nights | Carry-on WITH airline approval | $399 |
| 8 | EXP96 Pro | 307.2 Wh | 6.5 lb | 3 x 6 x 8.2 in | 4 to 6 nights | Not allowed on aircraft | $499 |
| 9 | Portable Outlet X9 | 159 Wh | 3.0 lb | 6 x 9.25 x 1.5 in | About 10 to 12 h | Carry-on WITH airline approval | $369 |
| 10 | Zopec Voyage | 146 Wh | 2.0 lb | 7 x 5 x 1.5 in | 1 to 2 nights | Carry-on WITH airline approval | $540 |
Prices checked September 14, 2026. Capacity, weight, and dimensions come from each manufacturer's spec sheet (Medistrom, Zopec, Transcend, CPAP Hero, EXP Pro, and Portable Outlet). Runtimes are without a heated humidifier at typical pressure. The EXP96 Pro is currently out of stock, and the Transcend PowerAway ships on backorder.
One thing decides more than any spec on this table: voltage. Your battery's voltage has to match your machine, full stop. The ResMed AirSense 10, AirSense 11, and AirMini all run on 24V. Philips DreamStation and DreamStation 2 run on 12V. The Pilot Flex, Freedom 160, EXP batteries, X9, and Zopec batteries handle this automatically through dual voltage, auto-detection, or a standard AC outlet. The Pilot-24 Lite is 24V only, and the Pilot-12 Lite is 12V only. Plugging in the wrong voltage can damage your machine.
3. The Best CPAP Batteries for 2026, Reviewed
The top pick depends on what you're doing with it. Frequent flyers do best with the dual-voltage Medistrom Pilot Flex; ResMed owners who want reliable backup should reach for the Medistrom Pilot-24 Lite; AirMini owners get the most runtime from the Zopec Explore Mini; anyone flying with a bigger battery wants the Freedom 160; and campers heading off-grid should go with the EXP96 Pro. Here's the full rundown, with the verified specs for each.
1. Medistrom Pilot Flex
The Medistrom Pilot Flex is Medistrom's newest travel battery, and it's the best pick for frequent flyers.
- Capacity: 98 Wh
- Weight: 1.2 lb
- Voltage: Dual, auto-detects 12V and 24V
- Charge time: 2 to 3 hours (or 4 to 6 hours over 45W USB-C)
- FAA status: Carry-on, no approval needed
At 98 Wh, it sits under the 100 Wh carry-on limit, and because it auto-detects your machine's voltage, one battery works across both ResMed and Philips machines. It weighs 1.2 lb, links with a second unit for extra capacity, and charges over USB-C. Without a humidifier, expect about 11 to 13 hours of runtime on an AirSense 11 or AirMini at 10 cmH2O [4].
The one catch: every machine except the AirMini needs its own DC cable kit, sold separately.
The Medistrom Pilot Flex is $339 (price checked September 14, 2026).
"This battery has an impressive 98 watt-hour capacity and it is FAA compliant, so you can bring it on flights. It weighs only 1.2 pounds, about the same weight as a small tablet like an iPad Mini."
— Gabriel, Sleeplay team
2. Medistrom Pilot-24 Lite
The Medistrom Pilot-24 Lite is our most popular CPAP battery and one of the highest-stocked products we carry.
- Capacity: 95 Wh
- Weight: 1.3 lb
- Voltage: 24V (ResMed)
- Cells: LG lithium-ion
- Cycle life: Over 500 charge cycles
- Extras: Built-in LED flashlight
- FAA status: Carry-on, no approval needed
At 95 Wh, it flies carry-on with no pre-approval, and it runs the ResMed AirSense 10, AirSense 11, and AirMini through a machine-specific cable kit. It charges straight from your machine's own power supply, doubles as a roughly 19,000 mAh phone charger, and has a built-in flashlight. Without humidification, plan on 1 to 2 nights per charge [5].
It's 24V only, so it won't work with 12V Philips DreamStation machines. Philips owners should look at the Pilot-12 Lite instead.
The Medistrom Pilot-24 Lite is $339 (price checked September 14, 2026).
3. Medistrom Pilot-12 Lite
The Medistrom Pilot-12 Lite is the dedicated pick for Philips machine owners.
- Capacity: 95 Wh
- Weight: 1.3 lb
- Voltage: 12V (Philips, DeVilbiss)
- Cells: LG lithium-ion
- Cycle life: Over 500 charge cycles
- FAA status: Carry-on, no approval needed
It shares the same 95 Wh, 1.3 lb body as the Pilot-24 Lite, but it's wired for 12V machines: the DreamStation 2, DreamStation, System One S60, and DeVilbiss IntelliPAP. It charges from the DreamStation adapter in 2 to 3 hours and carries the same flashlight and phone-charging features [6]. This is the current model, and there is no current Pilot-12 Plus.
It won't work with ResMed machines, and the DreamStation 2 needs its own dedicated cable, sold separately.
The Medistrom Pilot-12 Lite is $339 (price checked September 14, 2026).
4. Zopec Explore Mini
The Zopec Explore Mini is one of the lightest CPAP batteries available, and it's the fastest to recharge.
- Capacity: 99.5 Wh (Zopec lists 98 Wh on its air-travel page)
- Weight: 1.0 lb
- Charge time: About 1.5 hours
- Cells: Panasonic lithium-ion
- FAA status: Carry-on, no approval needed
It recharges fully in about 1.5 hours over 65W USB-C, and it ships with cables for the ResMed AirMini, AirSense 10, and AirSense 11 already in the box. Zopec's own runtime table shows about 15 hours on the AirMini and 12.5 hours on an AirSense at 10 cmH2O with the humidifier and heated tube off [7]. Zopec lists the capacity as 99.5 Wh on its product page and 98 Wh on its air-travel page. Either number keeps it under the 100 Wh carry-on threshold.
This one has no AC outlet, relying strictly on DC output to power CPAP machines through DC cables, not other household devices.
The Zopec Explore Mini is $349 (price checked September 14, 2026).
"If I run this AirMini at 10 cm of pressure on a Zopec Explore Mini, it is going to last around 15 hours, so nearly two nights on a single charge. By comparison, if I run the AirSense 10 or AirSense 11, even with the humidifier off, we are looking at around 10 hours from a single charge."
— Nick (Uncle Nicko from CPAP Reviews)
5. Transcend PowerAway
The Transcend PowerAway is built specifically for the Transcend Micro travel CPAP.
- Capacity: 71 Wh
- Weight: 1.0 lb (16.7 oz)
- Compatibility: Transcend Micro and Micro 510 only
- Cycle life: Over 1,000 charge cycles
- Solar compatible: Yes
It attaches with a native barrel connector and isn't cross-compatible with ResMed or Philips machines. Transcend rates it for up to 17.5 hours of cordless operation on a single charge, and for over 1,000 charge cycles [8]. At 71 Wh, it's well under the 100 Wh FAA threshold. Pair it with the Transcend Sun-Watt solar panel for convenient solar charging while off-grid.
It works only with the Transcend Micro and doesn't include its own power supply. It uses the machine's adapter.
The Transcend PowerAway is $349.95 (price checked September 14, 2026). Currently on backorder.
6. Freedom 160
The Freedom 160 is the highest-capacity battery that can still fly, with airline approval, and the most versatile all-rounder on this list.
- Capacity: 160 Wh
- Weight: 2.2 lb
- Dimensions: 7.9 x 5.1 x 1.0 in
- Kit includes: Both 12V and 24V cables, plus an AC supply
- Testing: UN 38.3 and UL2056 tested
- FAA status: Carry-on WITH airline approval
The kit ships with both a 24V cable (ResMed AirSense 10, AirSense 11, AirMini, Luna G3) and a 12V cable (Philips DreamStation 1 and 2, System One), so it works across brands right out of the box. Manufacturer runtime without humidification runs about 30 hours on an AirSense 11, 38 hours on an AirMini, and 24 hours on an AirSense 10 at 10 cmH2O [9]. At 160 Wh, it sits at the very top of the 101 to 160 Wh tier, so it flies carry-on with approval, not banned outright.
Trade-off: A Transcend Micro cable is sold separately, and running a heated humidifier cuts that runtime down to 1 to 2 nights.
The Freedom 160 is $349.99 (price checked September 14, 2026).
7. EXP48 Pro
The EXP48 Pro is a high-capacity LiFePO4 battery bank built for as a reliable portable power station for camping and home backup.
- Capacity: 153.6 Wh (154 Wh, 12.8 Ah at 12V)
- Weight: 3.25 lb
- Chemistry: LiFePO4
- Cycle life: Up to 5,000 charge cycles
- Warranty: 2 years
- FAA status: Carry-on WITH airline approval
It auto-detects 12V and 24V output, so there's no manual switch to flip. It delivers 2 to 3 nights of CPAP power without a humidifier, charges in about 2.5 hours, and comes with one machine-specific CPAP cord plus AC and 12V car chargers in the box [10]. Its LiFePO4 cells are rated for up to 5,000 cycles, far beyond typical lithium-ion. At 153.6 Wh, it sits in the 101 to 160 Wh tier and needs airline approval before you fly with it.
Trade-off: At 3.25 lb, it's heavier than a travel battery, and you'll need that airline approval sorted before your trip.
The EXP48 Pro is $399 (price checked September 14, 2026).
8. EXP96 Pro
The EXP96 Pro is our largest battery, built for multi-night camping and extended home backup.
- Capacity: 307.2 Wh
- Weight: 6.5 lb
- Chemistry: LiFePO4
- Warranty: 2 years
- FAA status: Not permitted on passenger aircraft
At 307.2 Wh, it powers a CPAP for 4 to 6 nights without a humidifier [11]. Here's the part people get wrong most often: under FAA rules, any battery over 160 Wh can't go on a passenger aircraft at all, in the cabin or checked [12], and the manufacturer confirms this model isn't airline-eligible [13]. Think of it as a car camping battery, not a fly-with battery.
Trade-off: It's too large for any flight, and at 6.5 lb it's something you carry, not something you pack light.
The EXP96 Pro is $499 (price checked September 14, 2026). Currently out of stock.
9. Portable Outlet X9
The Portable Outlet X9 is a universal backup battery built around a real AC outlet.
- Capacity: 159 Wh (14.4 Ah)
- Weight: 3.0 lb
- Output: Pure sine wave AC, 100W
- Compatibility: Any CPAP or BiPAP, no cables needed
- FAA status: Carry-on WITH airline approval
Because it has a built-in pure sine wave AC outlet, any CPAP or BiPAP plugs straight in, no special cable required, and it acts as an uninterruptible power supply that switches to battery the instant wall power drops. Pure sine wave output matters here, because it's the clean waveform CPAP motors are actually designed for [14]. At 159 Wh, it flies carry-on with airline approval.
Trade-off: Running a CPAP through an AC outlet is a little less efficient than a direct DC cable, so expect closer to 10 to 12 hours per charge.
The Portable Outlet X9 is $369 (price checked September 14, 2026).
10. Zopec Voyage
The Zopec Voyage is a compact universal battery built around its own 110V AC outlet.
- Capacity: 146 Wh
- Weight: 2.0 lb
- Output: Built-in 110V AC outlet, plus 45W USB-C PD
- Compatibility: Any CPAP through the AC outlet
- FAA status: Carry-on WITH airline approval
Like the X9, it runs any CPAP or BiPAP with no machine-specific cable, plus it adds a 45W USB-C port for your phone or tablet. Zopec's runtime table shows about 12 hours on an AirSense and 14 hours on an AirMini at 10 cmH2O without humidification [15]. At 146 Wh, it sits in the 101 to 160 Wh tier and flies carry-on with airline approval.
Trade-off: It's the priciest option here, and stock runs low. The X9 covers the same universal-AC use case for less.
The Zopec Voyage is $540 (price checked September 14, 2026).
4. Best CPAP Battery Backup for a Power Outage
The best backup battery for a power outage switches on automatically and holds enough capacity to get you through the night.
Some batteries stay plugged into the wall and pass power straight through, then take over the instant the grid drops, so there's no gap in therapy. That's called UPS mode, and it makes a battery genuinely reliable for an outage, not just for travel. The universal Portable Outlet X9 (159 Wh, pure sine wave, works with any machine) and the Freedom 160 (160 Wh, 3 to 5 nights) are the strongest picks for this. The popular Medistrom Pilot-24 Lite covers a single ResMed night from its own supply.
"You can keep it plugged into the wall while using your CPAP. If the power goes out, the battery takes over instantly. No interruptions to your CPAP therapy."
— Oswald Azua, Respiratory Therapist, Sleeplay
For the fuller storm-season picture, our CPAP Hurricane Preparedness Plan covers what else to have on hand, and you can compare every backup option in our CPAP Batteries collection.
5. Best CPAP Battery for Camping
For camping, match your battery's capacity to how many nights you'll be off-grid.
1 to 2 nights: The Pilot Flex (which also flies) or the Zopec Explore Mini.
3 to 4 nights off the grid: The EXP96 Pro (307.2 Wh, drives to the site, doesn't fly) or the Freedom 160.
Off-grid with recharging: The Transcend PowerAway paired with a solar panel.
"If you are looking for something to bring while camping, hands down, the EXP96 Pro battery bank. This powers your CPAP machine for up to four nights and can charge your lantern, fan, and phone all at the same time. It is like bringing a mini generator into the woods with you."
— Daniel Feldman, Sleeplay team
Two things make a real difference in the field. Use a DC cable instead of an AC inverter whenever your machine supports it, since DC is more efficient and stretches your runtime further. And skip the heated humidifier in favor of an HME, since it's one of the biggest drains on any battery. Cold weather also cuts into lithium battery capacity, so keep your battery inside your sleeping bag on colder nights rather than leaving it exposed.
For the full field guide, our Camping With Your CPAP Machine piece walks through packing, setup, and site selection in more detail.
6. Best CPAP Battery for the ResMed AirMini
The ResMed AirMini runs on 24V and skips the heated humidifier entirely, so it draws very little power and stretches further per battery than any full-size machine.
The best pairings are the Zopec Explore Mini (about 15 hours) and the Medistrom Pilot-24 Lite, both with an AirMini cable. Either way, expect close to two nights on a single charge.
- Zopec Explore Mini: Ships with an AirMini cable in the box, about 15 hours of runtime.
- Medistrom Pilot-24 Lite: Pair with the AirMini DC cable ($19.99).
- Medistrom Pilot Flex: Also compatible, no separate AirMini cable needed.
The AirMini uses a proprietary DC input, so you'll need an AirMini-specific cable no matter which battery you choose.
If you're still deciding on the machine itself, our guide to the ResMed AirMini AutoSet covers setup and travel use in full, and our AirMini vs Transcend Micro comparison is worth a look if you're weighing both travel machines.
7. Best CPAP Battery for the ResMed AirSense 11
The ResMed AirSense 11 is a 24V machine, so it needs a 24V battery and its own AirSense 11 cable, which is different from the AirSense 10 cable.
The simplest setup is the Medistrom Pilot-24 Lite with the AirSense 11 kit ($25). The Pilot Flex works too, with its own AirSense 11 cable kit ($18), and the Zopec Explore Mini does too, shipping with the cable in the box. If runtime matters more than portability, the Freedom 160 gives you the longest stretch, at about 30 hours without a humidifier, using the 24V cable already in its kit.
Turning the humidifier and heated tube off roughly doubles runtime on the AirSense 11. For camping, swap the humidifier for a Transcend AirMist HME instead, which adds passive moisture without drawing battery power.
8. Best CPAP Battery for the ResMed AirSense 10
The ResMed AirSense 10 is also a 24V machine, but it uses a different cable from the AirSense 11.
The go-to pairing is the Medistrom Pilot-24 Lite with the AirSense 10 kit ($25, currently out of stock, so use the Pilot Flex AirSense 10 cable in the meantime). The Zopec Explore Mini and Freedom 160 both include an AirSense 10 cable, and the universal Portable Outlet X9 skips the cable question entirely since it plugs into its own AC outlet.
9. CPAP Battery Compatibility Guide
Compatibility comes down to voltage. The ResMed AirSense 10, AirSense 11, and AirMini all run on 24V, while Philips DreamStation machines run on 12V.
Match your battery and the correct DC cable to your machine, or sidestep the cable question entirely with a universal AC-outlet battery that works with anything. The table below maps each machine to its battery and exact cable.
| CPAP machine | Best battery pick | Exact cable needed |
|---|---|---|
| ResMed AirSense 11 (24V) | Pilot-24 Lite, Pilot Flex, Zopec Mini, or Freedom 160 | AirSense 11 kit for Pilot-24 ($25) or Pilot Flex AS11 kit ($18); Zopec and Freedom include it |
| ResMed AirSense 10 (24V) | Pilot-24 Lite, Pilot Flex, Zopec Mini, or Freedom 160 | AS10 kit for Pilot-24 ($25) or Pilot Flex AS10 cable ($8); Zopec and Freedom include it |
| ResMed AirMini (24V) | Zopec Explore Mini or Pilot-24 Lite | AirMini cable ($19.99 for Pilot-24); Zopec includes it |
| Philips DreamStation 2 (12V) | Pilot-12 Lite, Pilot Flex, or Freedom 160 | DreamStation 2 kit for Pilot-12 ($15) or Pilot Flex DreamStation cable ($9.50); Freedom includes 12V |
| Transcend Micro / Micro 510 | Transcend PowerAway (attaches directly) | None; PowerAway uses a native connector |
| Any CPAP or BiPAP | Portable Outlet X9 or Zopec Voyage | None; plug into the built-in AC outlet |
Cable-kit prices checked September 14, 2026. All cable kits above are in stock except the Pilot-24 AirSense 10 kit. Voltage classifications come from ResMed and Philips machine specs and each battery manufacturer.
One note for owners of older HDM or Breas Z1 and Z2 travel machines, a line the manufacturer has since discontinued: we still stock the Extended Life Battery for Z1 and Z2 ($329, price checked September 14, 2026), which the manufacturer rates at 8.9 hours at 20 cmH2O. This one's worth mentioning only if you already own a Z1 or Z2.
10. How Long Does a CPAP Battery Last?
A CPAP battery lasts as long as its watt-hours divided by your machine's power draw.
Battery watt-hours ÷ your machine's running watts = runtime in hours.
Most travel batteries give you one to two nights without a humidifier, while high-capacity banks stretch to three to six. A full-size machine like the AirSense 11 draws far more power than the AirMini, which has a smaller motor and skips the heated humidifier altogether, and that's exactly why the AirMini runs so much longer per watt-hour. Since real power draw changes with pressure settings, it's worth using the manufacturer runtimes in the table below rather than relying on a single wattage figure.
| Battery | Capacity | Without humidifier | With heated humidifier |
|---|---|---|---|
| Transcend PowerAway | 71 Wh | Up to 17.5 h (Transcend Micro) | Not applicable (Micro has no humidifier) |
| Medistrom Pilot-24 Lite | 95 Wh | 1 to 2 nights | Not recommended; use an HME |
| Medistrom Pilot-12 Lite | 95 Wh | 1 to 2 nights | Not recommended; use an HME |
| Medistrom Pilot Flex | 98 Wh | About 2 nights | Not recommended; use an HME |
| Zopec Explore Mini | 99.5 Wh | AirMini ~15 h, AirSense ~12.5 h | Not recommended; use an HME |
| EXP48 Pro | 153.6 Wh | 2 to 3 nights | Reduced; humidifier off advised |
| Freedom 160 | 160 Wh | 3 to 5 nights (AS11 ~30 h) | 1 to 2 nights |
| EXP96 Pro | 307.2 Wh | 4 to 6 nights | Reduced; humidifier off advised |
Runtimes come from each manufacturer's spec sheet or run-time table at about 10 cmH2O with the heated humidifier and tube off. A heated humidifier can cut runtime by 30 to 50 percent.
If you're comparing travel machines themselves rather than just batteries, our Best Travel CPAP Machines guide breaks down runtime and portability side by side.
11. Can You Take a CPAP Battery on a Plane? FAA Rules
Yes, you can take a CPAP battery on a plane, but the watt-hours decide the rules.
Under 100 Wh flies as carry-on with no approval needed and no quantity limit. From 101 to 160 Wh, it flies carry-on with airline approval, up to two spares. Anything over 160 Wh isn't allowed on a passenger aircraft. And no matter the size, lithium-ion batteries always ride in carry-on, never checked.
| Watt-hours | Air travel rule | Batteries in this guide |
|---|---|---|
| Under 100 Wh | Carry-on, no airline approval, no quantity limit | Pilot Flex (98), Pilot-24 Lite (95), Pilot-12 Lite (95), Zopec Explore Mini (99.5), Transcend PowerAway (71) |
| 101 to 160 Wh | Carry-on WITH airline approval, up to 2 spare batteries | Freedom 160 (160), EXP48 Pro (153.6), Portable Outlet X9 (159), Zopec Voyage (146) |
| Over 160 Wh | Not permitted on passenger aircraft, cabin or checked | EXP96 Pro (307.2) |
Source: FAA, PackSafe: Lithium Batteries [12], and 49 CFR 175.10 [16] (both current).
A few practical tips beyond the tiers themselves: keep the battery in your carry-on, protect the terminals from a short circuit, and label it clearly with its Wh rating. If yours falls in the 101 to 160 Wh tier, call the airline before you fly to confirm approval.
One battery on this list gets this wrong more than any other: the EXP96 Pro, at 307.2 Wh, simply cannot fly. It's a home and camping battery, full stop. For everything under 160 Wh, our Flying With a CPAP Machine guide covers what to expect at airport screening, and Traveling With Sleep Apnea is worth a read for broader trip planning.
12. Best Off-Grid and Solar CPAP Battery
For true off-grid power, the Transcend PowerAway paired with the 40W Transcend Sun-Watt solar panel is the only complete solar CPAP setup we carry.
The panel recharges a depleted PowerAway in under four hours of direct sun [17], weighs under two pounds, and folds flat, so you can run a Transcend Micro indefinitely without ever finding an outlet. It only charges the PowerAway itself, not other batteries on this list.
"There is also a brand new solar panel from Transcend. It is lightweight, foldable, and built to recharge your Transcend Micro PowerAway battery using nothing but sunlight. No wall outlet, no power adapters needed."
— Daniel Feldman, Sleeplay team
If you're deciding whether the Transcend Micro is the right travel machine for you, our Somnetics Transcend Micro review covers it in full.
The Bottom Line
For most ResMed users, the Medistrom Pilot-24 Lite is the best all-around CPAP battery.
Frequent flyers should reach for the dual-voltage Pilot Flex, AirMini owners do best with the Zopec Explore Mini, storm-prone households want the Freedom 160 or the universal Portable Outlet X9, and off-grid campers should look at the EXP96 Pro or a PowerAway paired with solar. Whatever you choose, match it to your machine's voltage first, then everything else falls into place. Compare every option side by side in our CPAP Batteries collection.
Frequently Asked Questions
What is the best CPAP battery in 2026?
The best CPAP battery depends on your machine. For ResMed AirSense 10, AirSense 11, and AirMini users, the Medistrom Pilot-24 Lite at 95 Wh is the top overall pick. Frequent travelers who need a dual-voltage option prefer the Pilot Flex, while campers and extended-use users tend to choose the higher-capacity Freedom 160.
How long does a CPAP battery last?
Runtime depends on the battery's watt-hour capacity and your machine's power draw. Dividing watt-hours by watts gives approximate hours of use. A 95 to 100 Wh battery typically runs 1 to 2 nights without a humidifier. A 160 Wh battery can run 3 to 5 nights. Using a heated humidifier can reduce runtime by 30 to 50 percent.
Can I take a CPAP battery on a plane?
Yes, under FAA rules. Batteries under 100 Wh can be carried on without airline approval. Batteries from 101 to 160 Wh require airline approval and are limited to two spares per passenger. Batteries over 160 Wh are not permitted on passenger aircraft. Always pack batteries in carry-on luggage, never in checked baggage.
What battery works with the ResMed AirSense 11?
The AirSense 11 runs on 24V. The Medistrom Pilot-24 Lite with the AirSense 11 cable kit is the most straightforward option. The Pilot Flex, Zopec Explore Mini, and Freedom 160 are also compatible. For maximum runtime, turn off the heated humidifier and heated tube before running on battery power.
What is the biggest CPAP battery I can fly with?
The Freedom 160 at 160 Wh is the largest battery permitted on passenger aircraft. It sits at the top of the approved 101 to 160 Wh tier and requires airline approval before flying. Batteries over 160 Wh, such as the EXP96 Pro at 307.2 Wh, are not allowed on any passenger flight.
Does turning off the humidifier extend CPAP battery life?
Yes, significantly. The heated humidifier is the largest single drain on a CPAP battery and can reduce runtime by 30 to 50 percent. For travel and camping, turning it off and using a heat and moisture exchanger instead adds moisture without drawing any power from the battery.
Can I charge a CPAP battery with solar panels?
Yes. The Transcend PowerAway is designed to recharge from the 40W Transcend Sun-Watt solar panel, which can refill a depleted battery in under four hours of direct sunlight. This is the only complete solar CPAP charging system widely available, and it works in conjunction with the Transcend Micro travel CPAP.
What battery works with the ResMed AirMini?
The AirMini runs on 24V and draws relatively little power, resulting in longer runtimes. The Zopec Explore Mini, which includes a compatible cable in the box and delivers approximately 15 hours of use, and the Medistrom Pilot-24 Lite with the AirMini cable are the best pairings. Note that the AirMini requires its own proprietary DC cable and is not interchangeable with standard CPAP battery cables.
References
- Cleveland Clinic. "CPAP Machine." https://my.clevelandclinic.org/health/treatments/22043-cpap-machine
- American Academy of Sleep Medicine. "CPAP." SleepEducation.org. https://sleepeducation.org/patients/cpap/
- Kohler M, et al. "Effects of CPAP therapy withdrawal in OSA." Am J Respir Crit Care Med, 2011. PubMed. https://pubmed.ncbi.nlm.nih.gov/21836134/
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